tremoctopus violaceus

Violet blanket octopus (Tremoctopus violaceus) is an example of extreme sexual dimorphism in a species: females can be up to 2m in length whereas males are a tiny 1-2cm creatures.Jewelled Umbrella squid (Histioteuthis bonnellii).The jewels of this squid are bioluminescent photophores that cover its body and provide the most beautiful play of colours in deep see.